2021 field trips drone pictures

The opportunity using the drone facilitated enhancing the geological observations that otherwise has been not possible to be achieved. The volcanic areas of Romania are heavily forested, but there are situations with large outcrops that are difficult or impossible to be examined. We are showing in the following some of this situation examined with the drone (with photo and movie) in two different volcanic areas with Miocene volcanism of Romania.

România Geological map

România Geological map

Apuseni Mts.: Zărand basin (see location on the map)

  1. This is a view taken from the western part of the Zărand basin, close to Gurahonţ town, showing in the foreground the two andesitic dome structures to the left and larger view of the andesitic Bontău volcano to the right. They have been generated along important fracture line during the basin generation.
  2. The image is showing closer the two dome structures given in [1]. It is observable that at their lower slopes there is a sequence of multiple layered deposits discernable by their whitish color. Such deposits represent the initiation of dome generation that is characterized by various explosive events some of them including pumice. The presence of pumice increases the whitish color of the deposits.
  3. Here there is a closer detail of the almost vertical cliff in layered pyroclastic deposits surrounding the dome. As mentioned before the whitish layers, sometimes discontinuous include pumice, proving the explosive characteristic at the dome initiation. The grayish layers are mostly angular clast-supported, suggesting their origin from dome destruction and fragmentation.
  4. The view is even closer than previous and it is possible to better distinguish the layering sequence. Most of the deposits are decimeter to meter size and mostly are angular clast supported. There is a large size difference between the clasts in the same deposit.Călimani Mts., western part
  5. This is a ~50m vertical outcrop known as Piatra Corbului and included as geological reservation. The image is showing a layered sequence of andesitic deposits. At its base up to the one third the layers are thinner, mostly dm- to cm- sized characterized by fine ash material and pumice. Its texture is suggesting a secondary deposition most probably in a subaqueous environment. The upper third part is erosional and is looking as a sequence of thicker deposits, some of them angular clast supported. In the top right of the picture there is a breccia, most possible generated, as the deposits below from dome destruction and fragmentation, either as block and ash pyroclastic flows or breccias at the margins of a dome.
  6. The picture is a closer view of the previous one [5]. Here it is easier to see the discordance between the lower thinner deposits and upper mostly angular clast-supported ones. Such situation is characteristic for the evolution and generation of dome systems in a volcanic environment.
  7. This is a view of the northern ridge of the Cuşma town, western Călimani Mts. It is a sequence of finer and thinner (cam-dm size) and coarser and thicker (meter-size) fragmented deposits, showing a monogenetic composition. Most of them are primary as resulted from the dome destruction and fragmentation. Up to now such deposits were considered to be solely debris-flows (lahars).
  8. This is a closer view of [7]. Here it is obvious that the lower part is richer in fine and the upper part is richer in coarser layers where large angular clasts are more visible. The situation could be similar as in the pictures [5] and [6], but also the rock petrography is the same, represented by amphibole-pyroxene –bearing andesites.
  9. This view is from the Pietroasa valley (see map) and is characterized by a series of dm- to meter-size fragmented deposits. The deposits are matrix to clast –supported and monogenetic suggesting their origin in the dome destruction and fragmentation, either as block and ash deposits sometimes including pumices or dome breccias. The cliff hangover deposit in the upper part is showing an erosional concave base, suggesting an different, younger event.

2021 articles published in BDI journals by CUTE

Stoica A., and Ducea, M.N., 2021, A Mineral Scale Geochemical Investigation of Ultramafic Rocks From the San Carlos and Kilbourne Hole Xenolith Localities, Southwestern U.S.A.; Insights Into the Origin of the Regional Shallow Mantle: Open Science Framework DOI10.17605/OSF.IO/RKV38, Revue Rom de Geol, in press. Click to View

Ducea, M.N., 2021, On the Late Permian Age (258.3 +/- 2.5 Ma) and Tectonic Significance of the Cataracte Pegmatitic Leucogranite (Valcea County, Romania): Open Science Framework DOI10.17605/OSF.IO/2GRP6, Revue Rom de Geol, in press.  Click to View

Sundell, K., Laskowski, A., Kapp, P., Ducea, M.N., Chapman, J., 2021, Jurassic to Neogene Quantitative Crustal Thickness Estimates in Southern Tibet, GSA Today, v. 31, p. 4-10, 10.1130/GSATG461A.1  Click to View

Iatan Elena-Luisa 2021. Optical mineralogy and magnetic properties of four chondritic meteorites from Algerian West Sahara Desert. Rom. J. Mineral Deposits,vol. 94 (2021), No. 1-2, ISSN 1220-5648, in press

Pintea, Ioan; Berbeleac, Ion, Udubașa, Sorin Silviu; Nuţu-Dragomir, Maria-Lidia; Iatan , Luisa Elena 2021. Fluid and melt inclusions study related to the magmatic-hydrothermal apatite-anhydrite association from Voia porphyry Cu-Au-(Mo) prospect (Metaliferi Mountains, Romania). Revue Rom de Geol, Publishing House of the Romanian Academy, p15, in press

Latest 2021 ISI published articles of CUTE project

Chapman, J. B., Shields, J. E., Ducea, M. N., Paterson, S. R., Attia, S., and Ardill, K. E., 2021, The causes of continental arc flare ups and drivers of episodic magmatic activity in Cordilleran orogenic systems: Lithos, v. 398. Article number 106307. Click to View

Ducea, M. N., Chapman, A. D., Bowman, E., and Balica, C., 2021, Arclogites and their role in continental evolution; part 2: Relationship to batholiths and volcanoes, density and foundering, remelting and long-term storage in the mantle: Earth-Science Reviews, v. 214, article number 103476. Click to View

Ducea, M. N., Chapman, A. D., Bowman, E., and Triantafyllou, A., 2021, Arclogites and their role in continental evolution; part 1: Background, locations, petrography, geochemistry, chronology and thermobarometry: Earth-Science Reviews, v. 214, article number 103375. Click to View

Fernicola, J. C., Zimicz, A. N., Chornogubsky, L., Ducea, M., Cruz, L. E., Bond, M., Arnal, M., Cardenas, M., and Fernandez, M., 2021, The Early Eocene Climatic Optimum at the Lower Section of the Lumbrera Formation (Ypresian, Salta Province, Northwestern Argentina): Origin and Early Diversification of the Cingulata: Journal of Mammalian Evolution, v. 28, no. 3, p. 621-633. Click to View

Jepson, G., Carrapa, B., George, S. W. M., Triantafyllou, A., Egan, S. M., Constenius, K. N., Gehrels, G. E., and Ducea, M. N., 2021, Resolving mid- to upper-crustal exhumation through apatite petrochronology and thermochronology: Chemical Geology, v. 565, article number 120071. Click to View

Stephens, J. A., Ducea, M. N., Killick, D. J., and Ruiz, J., 2021, Use of non-traditional heavy stable isotopes in archaeological research: Journal of Archaeological Science, v. 127, article number 105334. Click to View

Vlasceanu, M., Ducea, M. N., Luffi, P., Barla, A., and Seghedi, I., 2021, Carpathian-Pannonian Magmatism Database: Geochemistry Geophysics Geosystems, v. 22, no. 9, Article e2021GC009970. Click to View

Zeng, Y., Ducea, M. N., Xu, J., Chen, J., and Dong, Y.-H., 2021, Negligible surface uplift following foundering of thickened central Tibetan lower crust: Geology, v. 49, no. 1, p. 45-50. Click to View

Seghedi, I., Ntaflos,T., Pécskay, Z., Panaiotu, C., Mirea V., Downes H., 2021. Miocene extension and magma generation in the Apuseni Mts. (western Romania): a review. International Geology Review, DOI: 10.1080/00206814.2021.1962416.  Click to View

Scoggin, S.H., Chapman, J.B., Shields, J.E., Trzinski, A.E. ,Ducea, M. N., – Early-Paleogene magmatism in the Pinaleño Mountains, Arizona: evidence for crustal melting of diverse basement assemblages during the Laramide Orogeny. Journal of Petrology, egab095, https://doi.org/10.1093/petrology/egab095, 2021  Click to View

Bowman, E.E., Ducea, M.N., Triantafyllou, A, 2021, Arclogites in the subarc lower crust: effects of crystallization, partial melting, and retained melt on the foundering ability of residual roots, Journal of Petrology, in press, 10.1093/petrology/egab094 Click to View

Zhang, L., Fan, W., Ding, L., Pullen, A., Ducea, M.N., Li, J., Wang, C., Xu, X., Sein, K., 2021, Forced subduction initiation within the Neotethys: An example from the mid-Cretaceous Wuntho-Popa arc in Myanmar, Geological Society of America Bulletin, in press, 10.1130/B35818.1 Click to View

Marcus J. Origlieri M J, Downs R T, Hoffman D R, Ducea M Nand Post J E., 2021, Marshallsussmanite, NaCaMnSi3O8(OH), a new pectolite-group mineral providing insight into hydrogen bonding in pyroxenoids. Mineralogical Magazine (2021), 85, 444–453, doi:10.1180/mgm.2018.2  Click to View

2021 participation of CUTE project members to conferences

Abstracts from EGU General Assembly 2021:

Mihai Tatu, Elena Luisa Iatan (2021). Late Cretaceous short-lived magmatism andrelated metallogenesis in the Carpathian area (Romania): connections with Balkans. EGU General Assembly 2021, 19–30 April, Vienna, Austria. Abstract EGU21-6452

Elena-Luisa Iatan (2021). The occurrence of gold in Voia deposit, South Apuseni Mountains, Romania. EGU General Assembly 2021, 19–30 April, Vienna, Austria. Abstract EGU21-4813

Viorel Mirea, Alexandru Szakacs, Ioan Seghedi (2021) An investigation approach of the volcanic geomorphology in the Călimani – Gurghiu – Harghita volcanic chain, Romania. EGU21-10745. https://doi.org/10.5194/egusphere-egu21-10745. Abstract EGU21-10745

G.C. Stefan, V.Mirea, I. Seghedi (2021) The Bontău Volcano, Apuseni Mts. (Romania), source for numerous debris avalanche deposits. EGU21-10855, https://doi.org/10.5194/egusphere-egu21-10855Abstract egu21-10855

Field Trips GSA219

Plan now to take advantage of these unique trips as part of your GSA 2019 experience.


14. Tectonic Development of the Colorado Plateau Transition Zone, Central Arizona: Insights from Lower Crustal and Mantle Xenoliths and Volcanic Host Rocks.
Sat., 21 Sept. Cost USD $240.

Cosponsors: GSA Geochronology Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; GSA Structural Geology and Tectonics Division.
Leaders: Alan D. Chapman, Macalester College; Nancy Riggs; Mihai N. Ducea.

Trip Description

This one-day outing will showcase Late Oligocene to Quaternary volcanic rocks and entrained lower-crustal and mantle xenoliths of the Transition Zone between the Colorado Plateau and the Basin and Range, as these materials provide key constraints on the tectonic evolution of the region. Important themes to be examined include (1) the growth, tectonic displacement, and foundering of sub-orogenic plateau (i.e., Nevadaplano) root material; and (2) the interplay between deep crust/upper mantle processes, late Cenozoic magmatism, and metamorphic core complex development.

Primary Leader Email Address: chapman@macalester.edu

Key qualifications: I’ve been engaged in NSF-funded study of the xenolith localities to be visited since 2015. I have been leading professional (e.g., a GSA Cordilleran Section Meeting trip in 2016), teaching, and outreach field trips for over a decade. Phoenix, Arizona, is an ideal central location from which to run this trip. All locations to be visited are within 1.5 hours’ drive from Phoenix. Professional preparation and appointments: University of Minnesota, B.S., 2005; California Institute of Technology; Ph.D., 2011, University of Arizona; Postdoctoral Researcher 2011–2013 Stanford University; Postdoctoral Researcher 2013–2014 Missouri S&T; Asst. Prof. of Geology 2013–2015 Macalester College; Asst. Prof. of Geology 2015. Relevant experience: Completed two three-week field camps through the University of Minnesota (2004 and 2005); completed two months of Ph.D. geologic mapping in a mountainous region of southern California (2006–2010); taught several one-day classes on the local geology at the Wind Wolves Preserve, California (summer, 2008–fall, 2009); teaching assistant for four-day field mapping projects at Caltech (2007, 2008, 2009, and 2010), led four one-day field trips for Don Benito Elementary School students and teachers, grades 2–6, on the geology of Eaton Canyon in Altadena, California (summer, 2008–winter, 2010); teaching assistant for three-week field camp through University of Arizona (2012); taught Missouri University of Science & Technology three-week summer field camp (2013 and 2014); led a two-day field institute to the Salinian block (central coastal California) for the GeoPrisms ExTerra Group in fall, 2014; led a two-day GSA Cordilleran section field trip to the southern Sierra Nevada–Mojave Desert (2016); led “Camp Rocks,” a three-day 4H camp in the Black Hills of Yavapai County for 52 4th–7th grade attendees from Yuma, Pima, and Maricopa counties, Arizona (2017); led a one-day geology activity and a hike for 30 students from Capitol Hill elementary school, St. Paul, Minnesota (May 2018).




Triantafyllou Antoine, Hodel Florent, Berger Julien, Macouin Melina, Baele Jean-Marc, Mattielli Nadine, Monnier Christophe, Ducea Mihai N., Poujol Marc, Langlade Jessica and Trindade Ricardo I.F. THE BOU AZZER AND SIRWA OPHIOLITES (ANTI-ATLAS, MOROCCO): INSIGHT INTO POLYPHASED SUBDUCTION-ACCRETION DYNAMICS DURING NEOPROTEROZOIC TIMES.  Click to View 

Ryan Eden, Kurt Sundell, Barbara Carrapa, Mihai Ducea, Joel Saylor. ZIRCON U-PB–LU-HF PETROCHRONOLOGY OF THE LATE CENOZOIC CENTRAL ANDES OF SOUTHERN PERU.  Click to View 

Chapman Alan D., Rautela Ojashvi, Shields Jessie E., Ducea Mihai N. and Saleeby Jason B. FATE OF THE LOWER LITHOSPHERE DURING SHALLOW-ANGLE SUBDUCTION: THE LARAMIDE EXAMPLE.  Click to View 


Promoting geosciences in high school

Promoting geosciences in high school
Attendance to the Romanian Geological Society’s Conference dedicated to the geological heritage
Visit to the Geology Museum as part of the partnership for promoting the Faculty of Geology and Geophysics

Previously published papers

Scott, E. M., Allen, M. B., MacPherson, C. G., McCaffrey, K. J. W., Davidson, J. P., Saville, C., & Ducea, M. N. (2018). Andean surface uplift constrained by radiogenic isotopes of arc lavas. Nature Communications9(1), [969]. https://doi.org/10.1038/s41467-018-03173-4. Click to View

Mihai N. Ducea, George W. Bergantz, James L. Crowley and Juan Otamendi (2017). Ultrafast magmatic buildup and diversification to produce continental crust during subduction. DOI:http://dx.doi.org/10.1130/G38726.1. Click to View 

Hu, F., Ducea, M. N., Liu, S., & Chapman, J. B. (2017). Quantifying Crustal Thickness in Continental Collisional Belts: Global Perspective and a Geologic Application. Scientific Reports7(1), [7058]. https://doi.org/10.1038/s41598-017-07849-7. Click to View 

James B. Chapman, George E. Gehrels, Mihai N. Ducea, Nicky Giesler, Alex Pullen. (2016). A new method for estimating parent rock trace element concentrations from zircon. Chemical Geology, ISSN: 0009-2541, Vol: 439, Page: 59-70. Click to View 

Paterson, S. R., & Ducea, M. N. (2015). Arc magmatic tempos: Gathering the evidence. Elements, 11(2), 91-98. https://doi.org/10.2113/gselements.11.2.91. Click to View

Mihai N. Ducea; Scott R. Paterson; Peter G. DeCelles (2015). High-Volume Magmatic Events in Subduction Systems. Elements 11(2):99-104 DOI: 10.2113/gselements.11.2.99. Click to View

Mihai N. Ducea, Jason B. Saleeby and George Bergantz (2015). The Architecture, Chemistry, and Evolution of Continental Magmatic Arcs. Annual Review of Earth and Planetary Sciences 43(1). DOI: 10.1146/annurev-earth-060614-105049. Click to View

James B. Chapman Mihai N. Ducea Peter G. DeCelles Lucia Profeta. (2015) Tracking changes in crustal thickness during orogenic evolution with Sr/Y: An example from the North American Cordillera. Geology 43 (10): 919-922.https://doi.org/10.1130/G36996.1. Click to View 

Lucia Profeta, Mihai N. Ducea, James B. Chapman, Scott R. Paterson, Susana Marisol Henriquez Gonzales, Moritz Kirsch, Lucian Petrescu & Peter G. DeCelles. (2015).  Quantifying crustal thickness over time in magmatic arcs. Scientific Reports. DOI: 10.1038/srep17786. Click to View